13 Planets

The Latest View of the Solar System

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Hardcover
$16.95 US
9.39"W x 9.34"H x 0.5"D  
On sale Mar 08, 2011 | 64 Pages | 9781426307706
Grades 3-7
Reading Level: Lexile 1120L | Fountas & Pinnell P

First, Pluto left. Then it came back, along with Ceres and Eris...and now Haumea and MakeMake, too! The recent actions of the International Astronomical Union have put every solar system book out of date. In response, National Geographic joins forces with David Aguilar of the Harvard Smithsonian Astronomical Observatory to revise our 2008 book—and to update young readers on the high-interest topic of space. Using simple text and spectacular photorealistic computer art by the author, this book profiles all 13 planets in their newly created categories—plus the sun, the Oort Cloud, comets, and other worlds being discovered. Back-of-the-book activities offer hands-on fun for budding astronomers.
© Aspen Skies
DAVID A. AGUILAR is an internationally recognized astronomer. He is the author and space artist of nine National Geographic and three Random House award-winning books, including: 7 Wonders of the Milky Way, a lively galactic journey through our home in the cosmos and Luna: The Science and Stories of Our Moon. He is an on-screen contributor and space artist for the History Channel's Universe series, the Science Channel's NASA's Unexplained Files, and the NHK (Japanese National Television Corporation) Cosmic Front series. In 2015, he joined NASA's New Horizons Mission Team as part of the historic Pluto Mission, and later in 2018-19, the Ultima Thule Kuiper Belt (KBO) Flyby Mission. In 2010, Asteroid 1990DA was named to honor his exceptional decades-long work to advance science education outreach.
CHRISTINE PULLIAM is the news director for the Space Telescope Institute in Baltimore, MD, and the past manager of media relations for the Harvard-Smithsonian Center for Astrophysics in Cambridge, MA. In her spare time, she flies airplanes.
PATRICIA DANIELS has written more than a dozen science and history books for adults and children, including the National Geographic Encyclopedia of Space and Constellations: My First Pocket Guide. View titles by David A. Aguilar
Once upon a time, long ago and far away, there were precisely seven planets: Moon, Mercury, Venus, Sun, Mars, Jupiter, and Saturn, all apparently revolving around a solidly fixed Earth. And then about five centuries ago came Nicholas Copernicus, who invented the solar system. He said the Sun was really in the middle surrounded by six planets: Mercury, Venus, Earth (with Moon), Mars, Jupiter, and Saturn. It was truly the Sun’s system, with Earth now a spinning planet. It was all very simple and elegant.
 
Three centuries after Copernicus, things were no longer so simple. In 1781 another big planet, Uranus, was found, and then a lot of small ones were given names like Ceres, Astraea, Flora, Hygeia, and Kalliope. In 1846, still another big planet, Neptune, gained planetary status. By 1854 there were 41 planets, and astronomers cried “Enough!” So they all decided there were eight large planets, and the little guys weren’t really planets but minor planets.
 
Today astronomers know that the solar system is much more complex and interesting than anyone dreamed of in the 1850s. There are more than 130 natural satellites, and more are being discovered. One, Saturn’s Titan, is bigger than the planet Mercury. If Titan and our moon had independent orbits, they would qualify as planets. Astronomers now have orbits for nearly 500,000 minor planets, half of which have been assigned numbers, and about 15,000 of which have been given names. Almost all of them are irregularly-shaped rocks, but at least one, Ceres, is massive enough for its gravity to pull it into a sphere, so it is a dwarf planet. And there are the comets, hoards of them in the deep freeze beyond Neptune.
 
Occasionally some of these huge chunks of dirty ice get nudged into the inner parts of the solar system, where they thaw out and sprout long, beautiful tails. And a few of these ice balls are massive enough to pull themselves into spherical dwarf planets. Pluto is one of these, smaller than our moon. Makemake and Haumea are still smaller, while Eris is a little larger than Pluto. Three of these even have their own satellites. Undoubtedly more of these icy dwarf planets await discovery.
 
For now, there are eight classical planets and five dwarf planets, making thirteen!
 
--Dr. Owen Gingerich, Former Research Professor of Astronomy, Harvard and Astronomer Emeritus, Smithsonian Astronomical Observatory
  • WINNER | 2011
    California Reading Association Eureka! Gold Award

About

First, Pluto left. Then it came back, along with Ceres and Eris...and now Haumea and MakeMake, too! The recent actions of the International Astronomical Union have put every solar system book out of date. In response, National Geographic joins forces with David Aguilar of the Harvard Smithsonian Astronomical Observatory to revise our 2008 book—and to update young readers on the high-interest topic of space. Using simple text and spectacular photorealistic computer art by the author, this book profiles all 13 planets in their newly created categories—plus the sun, the Oort Cloud, comets, and other worlds being discovered. Back-of-the-book activities offer hands-on fun for budding astronomers.

Author

© Aspen Skies
DAVID A. AGUILAR is an internationally recognized astronomer. He is the author and space artist of nine National Geographic and three Random House award-winning books, including: 7 Wonders of the Milky Way, a lively galactic journey through our home in the cosmos and Luna: The Science and Stories of Our Moon. He is an on-screen contributor and space artist for the History Channel's Universe series, the Science Channel's NASA's Unexplained Files, and the NHK (Japanese National Television Corporation) Cosmic Front series. In 2015, he joined NASA's New Horizons Mission Team as part of the historic Pluto Mission, and later in 2018-19, the Ultima Thule Kuiper Belt (KBO) Flyby Mission. In 2010, Asteroid 1990DA was named to honor his exceptional decades-long work to advance science education outreach.
CHRISTINE PULLIAM is the news director for the Space Telescope Institute in Baltimore, MD, and the past manager of media relations for the Harvard-Smithsonian Center for Astrophysics in Cambridge, MA. In her spare time, she flies airplanes.
PATRICIA DANIELS has written more than a dozen science and history books for adults and children, including the National Geographic Encyclopedia of Space and Constellations: My First Pocket Guide. View titles by David A. Aguilar

Excerpt

Once upon a time, long ago and far away, there were precisely seven planets: Moon, Mercury, Venus, Sun, Mars, Jupiter, and Saturn, all apparently revolving around a solidly fixed Earth. And then about five centuries ago came Nicholas Copernicus, who invented the solar system. He said the Sun was really in the middle surrounded by six planets: Mercury, Venus, Earth (with Moon), Mars, Jupiter, and Saturn. It was truly the Sun’s system, with Earth now a spinning planet. It was all very simple and elegant.
 
Three centuries after Copernicus, things were no longer so simple. In 1781 another big planet, Uranus, was found, and then a lot of small ones were given names like Ceres, Astraea, Flora, Hygeia, and Kalliope. In 1846, still another big planet, Neptune, gained planetary status. By 1854 there were 41 planets, and astronomers cried “Enough!” So they all decided there were eight large planets, and the little guys weren’t really planets but minor planets.
 
Today astronomers know that the solar system is much more complex and interesting than anyone dreamed of in the 1850s. There are more than 130 natural satellites, and more are being discovered. One, Saturn’s Titan, is bigger than the planet Mercury. If Titan and our moon had independent orbits, they would qualify as planets. Astronomers now have orbits for nearly 500,000 minor planets, half of which have been assigned numbers, and about 15,000 of which have been given names. Almost all of them are irregularly-shaped rocks, but at least one, Ceres, is massive enough for its gravity to pull it into a sphere, so it is a dwarf planet. And there are the comets, hoards of them in the deep freeze beyond Neptune.
 
Occasionally some of these huge chunks of dirty ice get nudged into the inner parts of the solar system, where they thaw out and sprout long, beautiful tails. And a few of these ice balls are massive enough to pull themselves into spherical dwarf planets. Pluto is one of these, smaller than our moon. Makemake and Haumea are still smaller, while Eris is a little larger than Pluto. Three of these even have their own satellites. Undoubtedly more of these icy dwarf planets await discovery.
 
For now, there are eight classical planets and five dwarf planets, making thirteen!
 
--Dr. Owen Gingerich, Former Research Professor of Astronomy, Harvard and Astronomer Emeritus, Smithsonian Astronomical Observatory

Awards

  • WINNER | 2011
    California Reading Association Eureka! Gold Award

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